Single torsion coil spring



FIG. 1 is a perspective view of a single torsion coil spring showing mynew design

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a plan/inverted plan view;

FIG. 5 is a right side view; and,

FIG. 6 is a left side view.

The ornamental design for a single torsion coil spring, as shown anddescribed.